The NMR system that produced all the spectra on this page costs less than $40,000.

19F NMR analysis is applicable to isomeric

mixtures such as shown in this spectrum of

l,l,2-trifluoro-2-chloro-3-vinylcyclobutane.

Peaks marked A are of one of the two isomers.

31 NMR can be used to analyze pesticides and other phosphorus- containing chemicals such as trimethylphosphite (spectrum shown).

1H NMR analysis of acetyl acetone at -19°C, +40°C, and+100° C shows the temperature dependence of this keto/enol equilibrium.

The multi-nucleus, easy-to-use, under-$40,000,

T-60 NMR spectrometer system. You get back a lot

more than you put in.

varian analytical instrument division

For details, or to arrange for a demonstration, write to Varian, Analytical Instrument Division, 611 Hansen Way, Palo Alto, California 94303 Circle No. 171 on Readers' Service Card

84 A · ANALYTICAL CHEMISTRY, VOL. 42, NO. 14, DECEMBER 1970